Skip to content

Instantly share code, notes, and snippets.

What would you like to do?
// starting with: object, childObject
// goal
// - given an object/array and a child object/array, give me the path to the child
// some code copied from:
function isPlainObject (obj) {
return === '[object Object]';
function forEachObject(obj, fn, path) {
for (const key in obj) {
const deepPath = path ? `${path}.${key}` : key;
// Note that we always use obj[key] because it might be mutated by forEach, obj[key], key, obj, deepPath);
deepForEach(obj[key], fn, deepPath);
function forEachArray(array, fn, path) {
array.forEach((value, index, arr) => {
const deepPath = `${path}[${index}]`;, value, index, arr, deepPath);
// Note that we use arr[index] because it might be mutated by forEach
deepForEach(arr[index], fn, deepPath);
function deepForEach(value, fn, path) {
path = path || '';
if (Array.isArray(value)) {
forEachArray(value, fn, path);
} else if (isPlainObject(value)) {
forEachObject(value, fn, path);
function getPathOfChildObject (parentObj, childObj) {
let path;
deepForEach(parentObj, function (value, key, subject, currentPath) {
if (value === childObj) {
path = currentPath;
return path;
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
You can’t perform that action at this time.